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Lee YR, Kim G, Lee HW, Tak WY, Park SY, Jang SY, Kweon YO, Park JG, Han YS, Chun JM, Han JR, Hur K. Long interspersed nuclear element-1 hypomethylation is associated with poor outcomes via the activation of ST18 in human hepatocellular carcinoma. Medicine (Baltimore) 2021; 100:e25552. [PMID: 33879706 PMCID: PMC8078304 DOI: 10.1097/md.0000000000025552] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/08/2020] [Accepted: 03/25/2021] [Indexed: 01/04/2023] Open
Abstract
The level of long interspersed nuclear element-1 (LINE-1) methylation, representing the global deoxyribonucleic acid methylation level, could contribute to the prognosis of cancer via the activation of oncogenes. This study was performed to evaluate the prognostic implications of LINE-1 hypomethylation in patients with hepatocellular carcinoma (HCC) and the possible mechanisms related to oncogene activation.Seventy-seven HCC patients between October 2014 and September 2015 were enrolled in this prospective study. Quantitative pyrosequencing was performed to assess the LINE-1 methylation level of HCC and matched non-HCC tissue samples. The expression of suppression of tumorigenicity 18 was measured by immunohistochemistry and its correlation with LINE-1 methylation levels was examined.LINE-1 was significantly hypomethylated in the HCC tissue compared with the matched nontumor tissue (64.0 ± 11.6% vs 75.6 ± 4.0%, P < .001). LINE-1 hypomethylation was an independent risk factor for overall survival (hazard ratio = 27.291, P = .032) and disease progression (hazard ratio = 5.298, P = .005). The expression of suppression of tumorigenicity 18 was higher in the hypomethylated LINE-1 HCC tissue than the hypermethylated LINE-1 tumor tissue (P = .030).LINE-1 hypomethylation may serve as a potential prognostic marker for patients with HCC.
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Affiliation(s)
- Yu Rim Lee
- Department of Internal Medicine, School of Medicine, Kyungpook National University, Kyungpook National University Hospital
| | - Gyeonghwa Kim
- Department of Biochemistry and Cell Biology, Cell and Matrix Research Institute, School of Medicine, Kyungpook National University
| | - Hye Won Lee
- Department of Pathology, Keimyung University School of Medicine
| | - Won Young Tak
- Department of Internal Medicine, School of Medicine, Kyungpook National University, Kyungpook National University Hospital
| | - Soo Young Park
- Department of Internal Medicine, School of Medicine, Kyungpook National University, Kyungpook National University Hospital
| | - Se Young Jang
- Department of Internal Medicine, School of Medicine, Kyungpook National University, Kyungpook National University Hospital
| | - Young Oh Kweon
- Department of Internal Medicine, School of Medicine, Kyungpook National University, Kyungpook National University Hospital
| | - Jung Gil Park
- Department of Internal Medicine, College of Medicine, Yeungnam University
| | - Young Seok Han
- Department of Surgery, School of Medicine, Kyungpook National University, Kyungpook National University Hospital, Daegu, South Korea
| | - Jae Min Chun
- Department of Surgery, School of Medicine, Kyungpook National University, Kyungpook National University Hospital, Daegu, South Korea
| | - Ja Ryung Han
- Department of Surgery, School of Medicine, Kyungpook National University, Kyungpook National University Hospital, Daegu, South Korea
| | - Keun Hur
- Department of Biochemistry and Cell Biology, Cell and Matrix Research Institute, School of Medicine, Kyungpook National University
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